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UNITED sTATEs PATENT oEEioE.

JULIUS M. COOK, OF HINSDALE, NEW YORK.

LOCK.

Specification of Letters Patent No. 17,424, dated June 2, 1857.

To all whom t may concern Be it known that I, JULIUs M. COOK, ofHinsdale, in the county of Oattaraugus and State of New York, haveinvented a new and Improved Mode of Constructing Locks, which I callOooks Defiance Set-Lock; and I do hereby declare that the following is afull and exact description of the said invention, reference being had tothe annexed drawings and to the letters and figures of reference markedthereon.

The nature of my invention consists of the bolt or bar (a) constructedwith a cavity in square form upon one side suficiently large to admit oftwo small wheels, (Z2) and (o), a set (d) and fly e, which is made fastto a smooth plate of metal in such manner as to form a box containingthe machinery, the bar and machinery sliding upon this plate, as theinstrument is locked br unlocked. The wheels are const-ructed with anotch in the side of each, so as to admit the hook upon one end of theset (d), upon the entry of which the other end of the set is removedfrom the range of a lsmall stud j, upon the plate f, which allows thebar to slide at pleasure. In wheel is inserted a shaft, made firm to thewheel, this sha-ft being inserted through slide wheel o, at the center,through a round hole, suficiently large to allow it to turn easily uponthe shaft, on which wheel is constructed a small spur near one edge ofthe wheel sufficiently far from the center as to come in contact withthat portion of fly (c) opposite the notch or swallowtail end. Thespiral spring is placed around the shaft (o), which presses againstwheel c. The fiy being passed over the shaft of the set cl, is then putin place as represented in letter (a), the fly being indicated by thered dots.

The bolt a, with all the fixtures is placed upon plate and made fast bymeans of clasp (g) and (h), as represented by Figures 1 and 2 and letterF. The star, 7c, is then placed upon shaft (b), which completes thelock, to unlock which the operator places a key upon the end of shaft(el), as indicated in Fig. 1, and turns the key to the left once and ahalf around and bringing the point on the star which protrudes directlyfrom the side of the square of sha-ft around to the degree on the dialopposite shaft (d). The first time the key is thus turned to the leftthe spur on wheel c is broughtinto contact with that part of Hy (e), asrepresented by letter f, which swings the dovetail end of the flyendward, and the next time the spur passes the dovetail will be in itstrack, and thus the motion of wheel c is stopped and wheel continues itsmotion until the notches in both wheels exactly correspond, which occursat the same moment the above point in the star reaches the degree to theleft of the crossed degree, the key is then turned to' the right, sothat the above point of the star, 12 degrees on the dial to the right ofthe degree indicated by the dash or cross at the top. Also indicated bythe little dot on the dial No. 1. At this point the notches in thewheels are brought opposite the hook (a) on the set, the key is thenremoved and placed upon shaft (cl) and turned to the left, by whichmeans the hook n enters the notches in the wheels and the other end ofthe set is brought out of line with the stud upon the plate and allowsthe bolt to slide at pleasure.

To lock the machine the set is removed from the notches in the wheelsand the key placed upon shaft (b) and turned once and a half at least tothe left, and the notches in the wheels become displaced again.

Fig. l represents a front View of my lock. Fig. 2, consists of a sideView of my lock.

Letter a, represents a separate view of inner portion of the bolt,wheels, fly and set, as appears when unlocked.

B is a separate View of the wheel Z), and shaft.

Letter c, is a view of slide wheel with spur p.

Letter d is a separate view of the set and shaft.

Letter e, as indicated on f by the red dotted lines, is a separate Viewof the fly.

Letter f is a View of the plate in connection with machinery in a lockedcondition. Stud j, and the hook M of the set are in conjunction.

Letter G, is a separate View of the clasp by which means the bolt a isattached to plate f by means of nutsand screws.

Letter h is a separate view of the clasp at the rear end of bolt a, andby means of which it is attached to plate f, by nuts and screws.

Letter z' is a separate View of the spiral spring.

Letter y', as indicated upon plate f, is a view of the stud upon theplate.

Letter k, is a separate View of the star. vLetter g presents'a View ofthumb piece Letter Zin plate f is a View of anopenng upon the bolt z inthe plate to admit a clasp suiiciently What I claim as my invention, anddestrong through which the bolt is to pass sire to secure by LettersPatent, is: l5 5 When looked. The set, arranged and operating in oonm isa Viewof the hook, on the set. neetion With -the Wheels, fly and shaftas n, is a View of the hook which passes into herein described.' thenotches in the Wheels. JULIS M. COOK. Letter 0 is a `View of the notchin thev Witnesses:

10 Wheels. ALEXANDER STORES,

Letter p, is a View of the spur .on Wheel o. Y DANL. JUDD.

